The free app (available on iOS and Android) doesn't have a snooze button, forces you to set a goal for yourself, and adds a serious dose of motivation from the one and only Dwayne “The Rock” Johnson.

When you open the Rock Clock, you're prompted to pick a goal. We chose one that was specific (run 10 miles this week) and one that was general (spend more time with friends). Once you’ve got your goal, set a time frame to complete it (you can also opt for “no end date”), choose your wake-up time (if you’re particularly masochistic, choose “Rock Time,” and wake up at the same time as Johnson, usually before 5 a.m.), and select an alarm tone (many showcase The Rock’s surprisingly good voice). The next day you’ll be greeted by your goal, words of wisdom from Johnson, and no option to snooze. The first morning we still felt sluggish and annoyed, but by the third day, we actually looked forward to our morning wake-up call.